本文選題：區(qū)域互聯(lián)電網(wǎng) + 安全域��； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：隨著我國(guó)經(jīng)濟(jì)的快速發(fā)展,很多地區(qū)出現(xiàn)電力供需矛盾,為解決我國(guó)固有的能源資源與經(jīng)濟(jì)發(fā)展逆向分布問題,大量電力需要實(shí)現(xiàn)遠(yuǎn)距離輸送;同時(shí),由于一次能源的巨大消耗已對(duì)環(huán)境造成了巨大污染,各種清潔能源得到快速發(fā)展和推廣,大規(guī)模的風(fēng)電、太陽能發(fā)電相繼入網(wǎng),為充分利用清潔的風(fēng)能、太陽能,大型新能源電站和超/特高電壓線路不斷建立,電網(wǎng)互聯(lián)程度不斷加強(qiáng)。為了保障電網(wǎng)安全穩(wěn)定運(yùn)行,研究互聯(lián)電力系統(tǒng)的安全穩(wěn)定問題具有十分重要的意義。本文基于安全域理論,針對(duì)電力大系統(tǒng)區(qū)域間互聯(lián)斷面的安全穩(wěn)定約束,提出了一種適用的安全域方法,并給出了構(gòu)建及求解該安全域?qū)嵱梅椒�。本文的主要工作如�?1、基于區(qū)域互聯(lián)電網(wǎng)的特點(diǎn),提出了一種適用的廣域安全域構(gòu)建思路。首先,通過分析區(qū)域間功率傳輸關(guān)系,提出利用區(qū)域間斷面交換功率作為安全域坐標(biāo)軸,以此來構(gòu)建安全域,其實(shí)質(zhì)是利用降維技術(shù),由斷面安全約束來間接反映整個(gè)電網(wǎng)的運(yùn)行安全性;其次,根據(jù)限制互聯(lián)斷面交換功率的安全穩(wěn)定問題,確定區(qū)域互聯(lián)電網(wǎng)廣域安全域的邊界約束;最后,給出安全域極限點(diǎn)的搜索策略和安全域邊界的擬合方法。2、將所提廣域安全域思路與斷面熱穩(wěn)定約束相結(jié)合,提出一種斷面熱穩(wěn)定安全域并給出其快速求解算法。首先,對(duì)斷面熱穩(wěn)定極限點(diǎn)進(jìn)行解析,得到單一約束下的安全域超平面邊界的法向量;其次,綜合利用仿真方法,給出關(guān)鍵臨界點(diǎn)(頂點(diǎn))的搜索策略,在減少搜索量的基礎(chǔ)上,保證不遺漏可能存在的約束條件;最后,提出斷面熱穩(wěn)定安全域邊界的快速計(jì)算綜合實(shí)現(xiàn)方法。3、基于所提安全域方法,設(shè)計(jì)開發(fā)了關(guān)鍵斷面多維空間熱穩(wěn)定安全域邊界分析計(jì)算系統(tǒng),實(shí)現(xiàn)了基礎(chǔ)數(shù)據(jù)導(dǎo)入、關(guān)聯(lián)基礎(chǔ)數(shù)據(jù)解析、極限點(diǎn)搜索、安全域計(jì)算擬合以及安全域顯示等功能。本文所提方法和所研發(fā)系統(tǒng),已在我國(guó)南方某大電網(wǎng)實(shí)際系統(tǒng)中得到應(yīng)用,其可行性和有效性得到很好驗(yàn)證。
[Abstract]:With the rapid development of our country's economy, there are contradictions between supply and demand of power in many areas. In order to solve the problem of reverse distribution of energy resources and economic development in our country, a great deal of electric power needs to be transported over long distances; at the same time,Because the huge consumption of primary energy has caused great pollution to the environment, all kinds of clean energy have been rapidly developed and popularized, large-scale wind power, solar power generation has been connected to the network, in order to make full use of clean wind energy, solar energy,Large new energy power stations and super / ultra-high voltage lines have been established and the interconnection of power grids has been strengthened.In order to ensure the safe and stable operation of power grid, it is of great significance to study the safety and stability of interconnected power system.Based on the theory of security domain, this paper presents a suitable security domain method for the security and stability constraints of inter-area interconnection in power system, and gives a practical method to construct and solve the security domain.The main work of this paper is as follows: 1. Based on the characteristics of regional interconnected power network, a suitable wide area security area construction idea is proposed.First of all, by analyzing the power transmission relationship between regions, it is proposed to use the interregional cross-section exchange power as the coordinate axis of the security domain to construct the security domain. The essence of which is to use the dimensionality reduction technology.The section security constraints indirectly reflect the operation security of the whole power network. Secondly, according to the security and stability problem of limiting the power exchange between the interconnected sections, the boundary constraints of the wide area security area of the regional interconnected power network are determined. Finally,The search strategy of the limit point in the security domain and the fitting method of the boundary in the security domain are given. By combining the proposed wide-area safe domain idea with the thermal stability constraint of the section, a fast solution algorithm for the safety region of the cross-section thermal stability is proposed.Firstly, the thermal stability limit point of the section is analyzed and the normal vector of the hyperplane boundary in the security domain under a single constraint is obtained. Secondly, the search strategy of the critical critical point (vertex) is given by synthetically using the simulation method.On the basis of reducing the search amount, the possible constraints are not omitted. Finally, a comprehensive method for fast calculation of the boundary of the thermal stability security domain is proposed, which is based on the proposed security domain method.The boundary analysis and calculation system for multi-dimensional thermal stability security domain of key sections is designed and developed. The functions of importing basic data, analyzing associated basic data, searching limit points, calculating and fitting security domain and displaying security domain are realized.The proposed method and the developed system have been applied to a large power grid system in the south of China, and its feasibility and effectiveness have been well verified.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM712

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